ibepubkey.c

IBE是一种非对称密码技术

/* Copyright 2003-2006, Voltage Security, all rights reserved.
 */
#include "vibecrypto.h"
#include "environment.h"
#include "base.h"
#include "libctx.h"
#include "keyobj.h"
#include "ibe.h"
#include "errorctx.h"

/* Gets the key data out of a key object.
 *
 * @param object The object from which the data is to be extracted.
 * @param getInfo The address where the function will deposit the
 * pointer to the info.
 * @param algorithm Either VOLT_KEY_ALG_IBE_TYPE_1 or
 * VOLT_KEY_ALG_BB_TYPE_1, indicating which type of key is to be
 * retrieved.
 * @return an int, 0 if the function completed successfully or a
 * non-zero error code.
 */
static int VOLT_CALLING_CONV VoltKeyGetIBEPublic VOLT_PROTO_LIST ((
   VtKeyObject object,
   Pointer *getInfo,
   unsigned int algorithm
));

int VtKeyParamBFType1IBEPublic (
   VtKeyObject object,
   Pointer info,
   unsigned int flag
   )
{
  int status;
  VOLT_DECLARE_FNCT_LINE (fnctLine)

  VOLT_SET_FNCT_LINE (fnctLine)
  status = VoltKeyParamIBEPublic (
    object, info, flag, VOLT_KEY_ALG_IBE_TYPE_1);

  VOLT_LOG_ERROR_INFO_COMPARE (
    status, 0, object, status, 0, 0,
    (char *)0, "VtKeyParamBFType1IBEPublic", fnctLine, (char *)0)

  return (status);
}

int VtKeyParamBBType1IBEPublic (
   VtKeyObject object,
   Pointer info,
   unsigned int flag
   )
{
  int status;
  VOLT_DECLARE_FNCT_LINE (fnctLine)

  VOLT_SET_FNCT_LINE (fnctLine)
  status = VoltKeyParamIBEPublic (
    object, info, flag, VOLT_KEY_ALG_BB_TYPE_1);

  VOLT_LOG_ERROR_INFO_COMPARE (
    status, 0, object, status, 0, 0,
    (char *)0, "VtKeyParamBBType1IBEPublic", fnctLine, (char *)0)

  return (status);
}

int VoltKeyParamIBEPublic (
   VtKeyObject object,
   Pointer info,
   unsigned int flag,
   unsigned int algorithm
   )
{
  int status;
  unsigned int bufferSize, paramAlg;
  VoltKeyObject *obj = (VoltKeyObject *)object;
  VtBFType1IBEPubKeyInfo *inputInfo = (VtBFType1IBEPubKeyInfo *)info;
  VoltLibCtx *libCtx = (VoltLibCtx *)(obj->voltObject.libraryCtx);
  VoltParameterObject *pObj;
  VoltBFType1IBEPubKeyData *localData;
  unsigned char *buffer = (unsigned char *)0;
  VOLT_DECLARE_ERROR_TYPE (errorType)
  VOLT_DECLARE_FNCT_LINE (fnctLine)

  paramAlg = VOLT_PARAM_ALG_BB_TYPE_1;
  if (algorithm == VOLT_KEY_ALG_IBE_TYPE_1)
    paramAlg = VOLT_PARAM_ALG_IBE_TYPE_1;

  do
  {
    if (flag == VOLT_KEY_GET_TYPE_FLAG)
    {
      VOLT_SET_ERROR_TYPE (errorType, 0)
      VOLT_SET_FNCT_LINE (fnctLine)
      status = VoltKeyGetIBEPublic (object, (Pointer *)info, algorithm);
      break;
    }

    /* Check the flag, it should be VOLT_KEY_SET_TYPE_FLAG.
     */
    VOLT_SET_ERROR_TYPE (errorType, VT_ERROR_TYPE_PRIMARY)
    VOLT_SET_FNCT_LINE (fnctLine)
    status = VT_ERROR_INVALID_TYPE;
    if (flag != VOLT_KEY_SET_TYPE_FLAG)
      break;

    /* Check the keyType in the object, it should be 0.
     */
    VOLT_SET_FNCT_LINE (fnctLine)
    status = VT_ERROR_INVALID_SET;
    if (obj->keyType != 0)
      break;

    /* The associated info should be a pointer to a
     * VtBFType1IBEPubKeyInfo struct.
     */
    VOLT_SET_FNCT_LINE (fnctLine)
    status = VT_ERROR_INVALID_ASSOCIATED_INFO;
    if (info == (Pointer)0)
      break;

    /* Valid param object?
     */
    VOLT_SET_FNCT_LINE (fnctLine)
    pObj = (VoltParameterObject *)(inputInfo->ibeParams);
    if (pObj == (VoltParameterObject *)0)
      break;

    VOLT_SET_FNCT_LINE (fnctLine)
    if (VOLT_OBJECT_TYPE_NOT_EQUAL (pObj, VOLT_OBJECT_TYPE_PARAMETER))
      break;

    VOLT_SET_FNCT_LINE (fnctLine)
    if (pObj->paramData == (Pointer)0)
      break;
    if ((pObj->paramType & VOLT_PARAM_TYPE_MASK_ALG) != paramAlg)
      break;
    if ((pObj->paramType & VOLT_PARAM_TYPE_PARAMS) == 0)
      break;
    if ((pObj->paramType & VOLT_PARAM_TYPE_CONTENTS) == 0)
      break;

    /* Create a VoltIBEPubKeyInfo struct.
     */
    VOLT_SET_FNCT_LINE (fnctLine)
    status = VT_ERROR_MEMORY;
    bufferSize =
      sizeof (VoltBFType1IBEPubKeyData) + inputInfo->encodedId.len;
    buffer = (unsigned char *)Z2Malloc (bufferSize, 0);
    if (buffer == (unsigned char *)0)
      break;
    Z2Memset (buffer, 0, bufferSize);
    localData = (VoltBFType1IBEPubKeyData *)buffer;
    localData->encodedId.data = buffer + sizeof (VoltBFType1IBEPubKeyData);

    /* Clone the parameter object.
     */
    VOLT_SET_ERROR_TYPE (errorType, 0)
    VOLT_SET_FNCT_LINE (fnctLine)
    status = VtCloneObject (
      (Pointer)pObj, (Pointer *)&(localData->ibeParams));
    if (status != 0)
      break;

    /* Copy the encoding into the local buffer.
     */
    Z2Memcpy (
      localData->encodedId.data, inputInfo->encodedId.data,
      inputInfo->encodedId.len);
    localData->encodedId.len = inputInfo->encodedId.len;

    obj->keyType =
      algorithm | VOLT_KEY_TYPE_PUBLIC | VOLT_KEY_TYPE_ENCRYPT |
      VOLT_KEY_TYPE_DATA;
    obj->keyData = (Pointer)localData;
    obj->KeyDataDestroy = IBEPubKeyDataDestroy;

    status = 0;

  } while (0);

  /* If everything worked, return 0.
   */
  if (status == 0)
    return (0);

  /* If something went wrong, destroy anything we created.
   */
  if (buffer != (unsigned char *)0)
    Z2Free (buffer);

  VOLT_LOG_ERROR (
    libCtx, status, errorType, fnctLine, "VoltKeyParamIBEPublic",
    (char *)0)

  return (status);
}

static int VoltKeyGetIBEPublic (
   VtKeyObject object,
   Pointer *getInfo,
   unsigned int algorithm
   )
{
  int status;
  VoltKeyObject *obj = (VoltKeyObject *)object;
  VoltLibCtx *libCtx = (VoltLibCtx *)(obj->voltObject.libraryCtx);
  VOLT_DECLARE_ERROR_TYPE (errorType)
  VOLT_DECLARE_FNCT_LINE (fnctLine)

  do
  {
    /* Is there data?
     */
    VOLT_SET_ERROR_TYPE (errorType, VT_ERROR_TYPE_PRIMARY)
    VOLT_SET_FNCT_LINE (fnctLine)
    status = VT_ERROR_GET_INFO_UNAVAILABLE;
    if (obj->keyData == (Pointer)0)
      break;

    /* Make sure the key data is appropriate.
     * We can get the public key data out of a private key object as
     * well.
     */
    VOLT_SET_FNCT_LINE (fnctLine)
    status = VT_ERROR_GET_INFO_UNAVAILABLE;
    if ((obj->keyType & VOLT_KEY_TYPE_MASK_ASYM_ALG) != algorithm)
      break;
    if ( ((obj->keyType & VOLT_KEY_TYPE_PRIVATE) == 0) &&
         ((obj->keyType & VOLT_KEY_TYPE_PUBLIC) == 0) )
      break;

    /* Is the key data the actual data? If so, we're done.
     */
    status = 0;
    *getInfo = obj->keyData;
    if ((obj->keyType & VOLT_KEY_TYPE_MASK_DATA) == VOLT_KEY_TYPE_DATA)
      break;

    /* The data is not available, does the object have a GetData
     * function?
     */
    VOLT_SET_FNCT_LINE (fnctLine)
    status = VT_ERROR_GET_INFO_UNAVAILABLE;
    *getInfo = (Pointer)0;
    if (obj->GetKeyData == (VGetKeyData)0)
      break;

    /* Call the Get function.
     */
    VOLT_SET_ERROR_TYPE (errorType, 0)
    VOLT_SET_FNCT_LINE (fnctLine)
    status = obj->GetKeyData ((VtKeyObject)obj, getInfo);

  } while (0);

  VOLT_LOG_ERROR_COMPARE (
    status, libCtx, status, errorType, fnctLine,
    "VoltKeyGetIBEPublic", (char *)0)

  return (status);
}

void IBEPubKeyDataDestroy (
   Pointer obj,
   Pointer ctx
   )
{
  VoltObject *voltObj = (VoltObject *)obj;
  VoltLibCtx *libCtx;
  VoltBFType1IBEPubKeyData *localData = (VoltBFType1IBEPubKeyData *)ctx;

  if ( (obj == (Pointer)0) || (ctx == (Pointer)0) )
    return;

  libCtx = (VoltLibCtx *)(voltObj->libraryCtx);

  VtDestroyParameterObject (&(localData->ibeParams));

  Z2Free (localData);
}